JP2582384B2 - Hot water supply control device for water heater - Google Patents
Hot water supply control device for water heaterInfo
- Publication number
- JP2582384B2 JP2582384B2 JP62312770A JP31277087A JP2582384B2 JP 2582384 B2 JP2582384 B2 JP 2582384B2 JP 62312770 A JP62312770 A JP 62312770A JP 31277087 A JP31277087 A JP 31277087A JP 2582384 B2 JP2582384 B2 JP 2582384B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- level
- pressure
- container
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、容器内に収容された溶湯の上面に加圧気体
を作用させることにより、溶湯供給管（ストーク）を通
して鋳型内に溶湯を供給する低圧鋳造装置等における給
湯機の給湯制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention supplies molten metal into a mold through a molten metal supply pipe (Stoke) by applying a pressurized gas to the upper surface of molten metal contained in a container. The present invention relates to a hot water supply control device of a hot water supply device in a low pressure casting device or the like.
（従来技術） 低圧鋳造装置等の給湯機においては、給湯を行なうこ
とにより容器内に収容された溶湯量が変化して湯面位置
が低下するため、常に一定圧の加圧気体によって給湯を
行なうように構成した場合には、上記湯面位置の低下量
に応じて給湯のタイミングおよび速度等が変化し、鋳造
品の品質が不均一になるという問題がある。このために
従来は、例えば実開昭55−111663号公報に示されるよう
に、容器内に収容された溶湯量の変化を給湯の回数に応
じて計算し、この計算により求めた湯面位置の低下量に
応じて加圧気体の供給圧力を制御することが行なわれて
いるが、この場合には上記計算の基準となる制御開始時
点の湯面位置および鋳型に対する給湯量を正確に求める
ことができないと、給湯時点における湯面位置を正確に
算出することができず、適正な給湯制御を実行できなく
なるという問題がある。(Prior art) In a water heater such as a low-pressure casting machine, since the amount of molten metal contained in a container changes as the hot water is supplied and the level of the molten metal lowers, the hot water is always supplied by a pressurized gas of a constant pressure. In the case of such a configuration, there is a problem that the timing and speed of hot water supply change according to the amount of decrease in the molten metal surface position, and the quality of the cast product becomes uneven. For this purpose, conventionally, as shown in, for example, Japanese Utility Model Laid-Open No. 55-111163, a change in the amount of molten metal stored in a container is calculated according to the number of times of hot water supply, and the level of the molten metal surface obtained by this calculation is calculated. Although the supply pressure of the pressurized gas is controlled in accordance with the amount of decrease, in this case, it is necessary to accurately obtain the molten metal position at the start of control and the amount of hot water supplied to the mold, which serve as the basis for the above calculation. If not, there is a problem that the hot water surface position at the time of hot water supply cannot be accurately calculated, and proper hot water supply control cannot be executed.
また、上記容器内の湯面位置を検出する湯面検出セン
サを設け、この湯面検出センサの検出値に応じて容器内
の湯面位置を直接検出することも考えられるが、上記容
器内には鉱滓（のろ）が浮遊しているため、この鉱滓の
存在によって湯面位置の正確な検出が妨げられるという
問題がある。It is also conceivable to provide a level detecting sensor for detecting the level of the level in the container and directly detect the level of the level in the container in accordance with the detection value of the level sensor. There is a problem in that the presence of the slag prevents accurate detection of the molten metal position because the slag is floating.
（発明の目的） 本発明は、上記問題点を解決するためになされたもの
であり、容器内に浮遊した鉱滓の影響を受けることなく
容器内の溶湯量を正確に求めることができ、この溶湯量
に基づいて溶湯の供給制御を適正に実行することができ
る給湯機の給湯制御装置を提供するものである。(Object of the Invention) The present invention has been made in order to solve the above problems, and the amount of molten metal in a container can be accurately obtained without being affected by slag floating in the container. An object of the present invention is to provide a hot water supply control device of a hot water supply device capable of appropriately executing a supply control of a molten metal based on an amount.
（発明の構成） 本発明は、容器内に収容された溶湯の上面に加圧手段
によって加圧気体を作用させることにより、溶湯供給管
を通して溶湯を供給する給湯機において、下端部が上記
溶湯内に浸漬された筒体と、溶湯の供給時に筒体内の湯
面が所定の検知位置に上昇したことを検知する湯面検知
手段と、この湯面検知手段から湯面検知信号が出力され
た時点で上記筒体の上端部を大気圧雰囲気に連通させた
状態から上記加圧気体の供給圧力雰囲気に連通した状態
に切換える切換手段と、上記湯面検知信号の出力時点に
おける加圧気体の供給圧力を検出する圧力検出手段と、
この圧力検出手段の検出値に応じて容器内の溶湯量を演
算する溶湯量演算手段と、この溶湯量演算手段により算
出された溶湯量に基づいて上記加圧手段による加圧気体
の供給圧力を制御する制御手段とを設けたものである。(Structure of the Invention) The present invention relates to a water heater for supplying a molten metal through a molten metal supply pipe by applying a pressurized gas to the upper surface of the molten metal accommodated in a container. A cylinder immersed in the molten metal, a level detecting means for detecting that the level of the molten metal in the cylinder has risen to a predetermined detection position when the molten metal is supplied, and a time when a level detection signal is output from the level detecting means. A switching means for switching from a state in which the upper end of the cylindrical body is communicated with the atmospheric pressure atmosphere to a state in which it is communicated with the supply pressure atmosphere of the pressurized gas, and a supply pressure of the pressurized gas at the time of output of the molten metal level detection signal. Pressure detecting means for detecting
Melt amount calculating means for calculating the amount of molten metal in the container in accordance with the detected value of the pressure detecting means; and supply pressure of the pressurized gas by the pressurizing means based on the amount of molten metal calculated by the molten metal amount calculating means. And control means for controlling.
上記の構成によれば、下端部を溶湯内に浸漬して鉱滓
の侵入を防止するようにした筒体内の湯面上昇状態を検
知するとともに、上記湯面が所定の検知位置に上昇した
時点における加圧気体の供給圧力を検出することによ
り、この供給圧力に基づいて、上記鉱滓の影響を受ける
ことなく容器内の溶湯量を正確に算出することができ、
この溶湯量に基づいて加圧気体の供給圧力を制御するこ
とにより、溶湯の供給タイミングおよび速度等を適正に
制御することができる。According to the above configuration, the lower end portion is immersed in the molten metal to detect the rising state of the molten metal level in the cylindrical body to prevent the intrusion of the slag, and at the time when the molten metal level rises to the predetermined detection position. By detecting the supply pressure of the pressurized gas, based on the supply pressure, the amount of molten metal in the container can be accurately calculated without being affected by the slag,
By controlling the supply pressure of the pressurized gas based on the amount of the molten metal, the supply timing and speed of the molten metal can be appropriately controlled.
（実施例） 第１図は、低圧鋳造装置を構成する給湯機の給湯制御
装置の実施例を示している。上記給湯機は、上端部が蓋
体１によって閉止された保温炉２と、この保温炉２内に
設置された溶湯収容用の容器３と、鋳型４内に溶湯を供
給する溶湯供給管５と、上記保温炉２内に加圧空気を供
給する加圧手段６と、保温炉２内の加圧空気を排出する
電磁排気弁７が設けられた排気通路８とを備えている。(Embodiment) Fig. 1 shows an embodiment of a hot water supply control device of a hot water supply device constituting a low pressure casting device. The water heater includes a heat retaining furnace 2 whose upper end is closed by a lid 1, a container 3 for storing molten metal installed in the heat retaining furnace 2, and a molten metal supply pipe 5 for supplying molten metal into a mold 4. A pressurizing means 6 for supplying pressurized air into the heat retaining furnace 2; and an exhaust passage 8 provided with an electromagnetic exhaust valve 7 for discharging pressurized air from the heat retaining furnace 2.
上記加圧手段６は、加圧空気の供給源９と、電磁開閉
弁10と、電磁サーボ弁11と、加圧空気供給管12とを備
え、制御手段13から出力される制御信号に応じて上記電
磁開閉弁10を開放して保温炉２内に加圧空気を供給し、
容器３内に収容された溶湯14の上面に加圧空気を作用さ
せて溶湯供給管５内の湯面を上昇させることにより、鋳
型４内に溶湯14を所定の圧力で供給するように構成され
ている。また、上記加圧手段６による加圧空気の供給圧
力は制御手段13から出力される制御信号に応じて電磁サ
ーボ弁11を作動させることにより制御され、かつ加圧空
気供給管12に設けられた圧力計からなる圧力検出手段15
によって上記供給圧力が検出されるようになっている。The pressurizing means 6 includes a pressurized air supply source 9, an electromagnetic on-off valve 10, an electromagnetic servo valve 11, and a pressurized air supply pipe 12, and according to a control signal output from the control means 13. The above-mentioned solenoid on-off valve 10 is opened to supply pressurized air into the insulated furnace 2,
By applying pressurized air to the upper surface of the molten metal 14 contained in the container 3 to raise the level of the molten metal in the molten metal supply pipe 5, the molten metal 14 is supplied into the mold 4 at a predetermined pressure. ing. The supply pressure of the pressurized air by the pressurizing means 6 is controlled by operating the electromagnetic servo valve 11 in accordance with a control signal output from the control means 13, and is provided in the pressurized air supply pipe 12. Pressure detecting means 15 consisting of a pressure gauge
Thus, the supply pressure is detected.
上記保温炉２の蓋体１には、下端部が溶湯14内の深部
に浸漬され、かつ上端部が連通管16によって大気と連通
された筒体17が設置されている。この筒体17には、上記
鋳型４に対する溶湯14の供給時に筒体17内の湯面が所定
の検知位置に上昇したことを検知する一対の導線18を備
えた通電方式の湯面検知手段19が設けられている。ま
た、上記筒体17には湯面検知手段19から湯面検出信号が
出力された時点で制御手段13から出力される制御信号に
応じ、上記連通管16の端部を開放して大気に連通させた
状態から加圧手段６の加圧空気供給管12に分岐管20を介
して連通させた状態とに切換える電磁切換弁からなる切
換手段21が設けられている。A cylindrical body 17 whose lower end is immersed in a deep portion of the molten metal 14 and whose upper end is communicated with the atmosphere by a communication pipe 16 is provided on the lid 1 of the heat insulating furnace 2. The cylindrical body 17 is provided with a pair of conducting wires 18 for detecting that the level of the molten metal in the cylindrical body 17 has risen to a predetermined detection position when the molten metal 14 is supplied to the mold 4. Is provided. Further, in response to a control signal output from the control means 13 when the molten metal level detection signal is output from the molten metal level detection means 19, the end of the communication pipe 16 is opened to communicate with the atmosphere. There is provided switching means 21 comprising an electromagnetic switching valve for switching from a state in which the pressure is applied to a state in which the pressure air supply pipe 12 of the pressurizing means 6 is communicated via a branch pipe 20.
そして、上記切換手段21を大気開放側に設定した状態
で、上記加圧手段６から容器３内の湯面に加圧空気を作
用させて筒体17内の溶湯14を上昇させ、この筒体17内の
湯面が上記湯面検知手段19の検知位置つまり上記導線18
の下端部まで上昇して上記湯面検知信号が出力された時
点における加圧空気の供給圧力を圧力検出手段15により
検出した後、この検出値に基づいて容器３内の溶湯量を
溶湯量演算手段22において演算するように構成されてい
る。すなわち、上記筒体17内の湯面の上昇状態は、容器
３内の溶湯量および上記加圧空気の供給圧力に応じて変
化するため、筒体17内の湯面が所定の検知位置に上昇し
た時点における加圧空気の供給圧力を検出することによ
り、これに基づいて容器３内の溶湯量を算出するように
している。Then, with the switching means 21 set to the atmosphere open side, pressurized air acts on the molten metal surface in the container 3 from the pressurizing means 6 to raise the molten metal 14 in the cylindrical body 17, The level of the molten metal in 17 is the detection position of the level detecting means 19, that is, the conductor 18
After the supply pressure of the pressurized air at the time when the molten metal level detection signal is output to the lower end of the container 3 is detected by the pressure detecting means 15, the amount of molten metal in the container 3 is calculated based on the detected value. The means 22 is configured to calculate. That is, since the rising state of the molten metal level in the cylinder 17 changes according to the amount of molten metal in the container 3 and the supply pressure of the pressurized air, the molten metal level in the cylinder 17 rises to a predetermined detection position. By detecting the supply pressure of the pressurized air at the point of time, the amount of molten metal in the container 3 is calculated based on the detected pressure.
また、上記溶湯量の演算結果に基づいて上記加圧手段
６の電磁サーボ弁11の開度を調節する制御信号が制御手
段13から出力され、加圧空気の供給圧力が制御されるよ
うになっている。Further, a control signal for adjusting the opening of the electromagnetic servo valve 11 of the pressurizing means 6 is output from the control means 13 based on the calculation result of the molten metal amount, so that the supply pressure of the pressurized air is controlled. ing.
上記構成の給湯制御装置による制御動作を第２図に示
すフローチャートに基づいて説明する。この制御動作が
スタートすると、まずステップS1において制御手段13内
に設けられたタイマを作動させて給湯制御時間の計測を
開始する。そして、ステップS2において排気通路８の電
磁排気弁７を閉止して保温炉２を密閉状態にするととも
に、ステップS3において連通管16の切換手段21を大気開
放側に設定して筒体17の上端部を大気圧状態の雰囲気に
連通させる。次にステップS4において加圧手段６の電磁
開閉弁10を開放するとともに、ステップS5において電磁
サーボ弁11を予め設定された加圧特性に応じて作動させ
ることにより、容器３内の湯面に作用する加圧空気の供
給圧力を徐々に増大させる。The control operation of the hot water supply control device having the above configuration will be described based on the flowchart shown in FIG. When this control operation is started, activates the timer provided in the control unit 13 first in step S 1 and starts measuring the hot water supply control time. Then, the heat retaining furnace 2 closes the solenoid exhaust valve 7 in the exhaust passage 8 as well as in a closed state in step S 2, by setting the switching means 21 of the communication pipe 16 to the air open side in step S 3 the tubular body 17 Is communicated with the atmosphere at atmospheric pressure. Then with opening the electromagnetic on-off valve 10 of the pressure means 6 in step S 4, by operating in accordance with the pressure pressure characteristic which is set to the electromagnetic servo valve 11 previously in step S 5, the molten metal surface in the container 3 The supply pressure of the pressurized air acting on the air is gradually increased.
次いでステップS6において湯面検知手段19により筒体
17内の湯面の上昇状態を検知し、上記加圧空気によって
筒体17内の湯面が押上げられて湯面検知手段19の検知位
置まで上昇したことが検知されたか否かを判別する。そ
してこの判別の結果、筒体17内の湯面が上記検知位置ま
で上昇して湯面検知手段19から検知信号が出力されたこ
とが確認された時点で、ステップS7において連通管16の
切換手段21を加圧空気供給管12側に切換えて加圧空気を
上記筒体17内に供給する。また、ステップS8において上
記圧力検出手段15により加圧空気の供給圧力を検出して
その検出値を入力した後、ステップS9において上記検出
値に基づいて容器３内の溶湯量を演算する。Then the tubular member by the molten metal surface detection means 19 in step S 6
The rising state of the molten metal level in the cylinder 17 is detected, and it is determined whether or not it has been detected that the molten metal level in the cylindrical body 17 has been pushed up by the pressurized air and has risen to the detection position of the molten metal level detecting means 19. . As a result of this determination, when the that molten metal surface inside the cylinder body 17 detects the signal from the melt surface detection means 19 rises to the detection position is outputted has been confirmed, the switching of the communication pipe 16 in step S 7 The means 21 is switched to the side of the pressurized air supply pipe 12 to supply pressurized air into the cylinder 17. Further, after entering the detection value by detecting the supply pressure of the pressurized air by the pressure detecting means 15 in step S 8, and calculates the melt amount in the container 3 based on the detection value in step S 9.
次にステップS10において電磁サーボ弁11を作動させ
る基準となる加圧特性を上記容器３内の溶湯量に基づい
て補正し、この溶湯量に応じた給湯制御を実行する。す
なわち、上記容器３内の溶湯量は給湯が行なわれるたび
に減少して湯面位置が低下するため、この湯面位置の低
下量を溶湯量演算手段22の演算結果に基づいて求める。
そして第３図に示すように、溶湯量が最大量にある場合
に対応した基準加圧特性ａを、上記湯面位置の低下量に
応じて高圧側に変位させた補正後の加圧特性b,c,dに基
づいて加圧空気の供給圧力を調節することにより、鋳型
４に対する給湯のタイミングおよび速度が適正状態とな
るように制御する。Then the pressurized pressure characteristic serving as a reference for operating the solenoid servo valve 11 is corrected on the basis of the molten metal amount in the container 3 in step S 10, executes a hot water supply control according to the melt amount. That is, since the amount of molten metal in the container 3 decreases every time hot water is supplied and the level of the molten metal decreases, the amount of decrease in the level of the molten metal is determined based on the calculation result of the molten metal amount calculating means 22.
Then, as shown in FIG. 3, the corrected pressurizing characteristic b in which the reference pressurizing characteristic a corresponding to the case where the amount of the molten metal is at the maximum amount is displaced toward the high pressure side in accordance with the decrease amount of the molten metal surface position. By controlling the supply pressure of the pressurized air based on, c, and d, the timing and speed of hot water supply to the mold 4 are controlled to be in an appropriate state.
次いでステップS11において上記タイマにより設定さ
れた給湯制御時間がタイムアップしたか否かを判別する
ことにより、給湯が完了したか否かを確認する。上記の
判別の結果、給湯が完了したことが確認された時点で、
ステップS12において電磁サーボ弁11の作動を停止させ
る。また、ステップS13において電磁開閉弁10を閉止し
て加圧空気の供給を停止した後、ステップS14において
排気通路８の電磁排気弁７を開放して保温炉２内に残留
している加圧空気を外部に排出する。次いで、ステップ
S15において保温炉２内の残圧が所定値以下に低下した
か否かを判別する。そして上記残圧が低下したことが確
認された時点で、ステップS16において連通管16の切換
手段21を大気開放側に切換えるとともに、ステップS17
において鋳型４を開作動させる制御信号を出力して制御
動作を終了する。Then hot water supply control time set by the timer in step S 11 is by determining whether the time is up, to check whether the hot water supply has been completed. As a result of the above determination, when it is confirmed that hot water supply has been completed,
In Step S 12 to stop the operation of the electromagnetic servo valve 11. Further, after closes the electromagnetic on-off valve 10 to stop the supply of pressurized air in step S 13, pressurized remaining in the open to the heat insulation furnace 2 the solenoid exhaust valve 7 in the exhaust passage 8 at step S 14 Discharge compressed air to the outside. Then step
Residual pressure in the thermal insulation furnace 2 it is determined whether or not falls below a predetermined value in S 15. And when the residual pressure was confirmed that decreased, switches the switching means 21 of the communication pipe 16 to the air open side in step S 16, step S 17
Outputs a control signal for opening the mold 4 to end the control operation.
上記のように下端部が容器３の溶湯14内に浸漬された
筒体17を設け、この筒体17に導入された溶湯14の上昇状
態を湯面検知手段19によって検出するように構成したた
め、上記容器３内に浮遊した鉱滓の影響を受けることな
く、上記溶湯14が筒体17内の検知位置に上昇したことを
正確に検出し、この検出結果に基づいて容器３内の溶湯
量を正確に算出することができる。As described above, since the lower end is provided with the cylindrical body 17 immersed in the molten metal 14 of the container 3, and the rising state of the molten metal 14 introduced into the cylindrical body 17 is configured to be detected by the molten metal level detecting means 19, It is accurately detected that the molten metal 14 has risen to the detection position in the cylindrical body 17 without being affected by the slag floating in the container 3, and the amount of the molten metal in the container 3 is accurately determined based on the detection result. Can be calculated.
すなわち、上記容器３内に溶湯14を充填あるいは補充
する際に、溶湯14が撹拌されることにより酸化されて鉱
滓23が形成され、この鉱滓23が溶湯14の上面に浮遊する
こととなるが、上記筒体17はその下端部が溶湯14内に浸
漬されているため、この筒体17内に上記鉱滓23が侵入す
るのを効果的に阻止することができる。この結果、上記
鉱滓23の影響を排除して湯面検知手段19の検知位置に溶
湯14の上面が到達したことを正確に検出することがで
き、この時点における加圧空気の供給圧力に基づいて容
器３内の溶湯量を溶湯量演算手段22により正確に検出す
ることができる。したがって、上記溶湯量に応じて加圧
空気の供給圧力を調節することにより、適正な給湯タイ
ミングおよび速度で鋳型４内に溶湯14を供給して低圧鋳
造を行なうことができる。上記筒体17内に鉱滓23が侵入
するのを効果的に阻止するためには、筒体17の下端部を
溶湯14の深部に浸漬することが望ましい。That is, when filling or replenishing the molten metal 14 in the container 3, the molten metal 14 is oxidized by stirring to form slag 23, and the slag 23 floats on the upper surface of the molten metal 14. Since the lower end of the cylindrical body 17 is immersed in the molten metal 14, the slag 23 can be effectively prevented from entering the cylindrical body 17. As a result, it is possible to accurately detect that the upper surface of the molten metal 14 has reached the detection position of the molten metal level detecting means 19 by eliminating the influence of the slag 23, and based on the supply pressure of the pressurized air at this time. The amount of molten metal in the container 3 can be accurately detected by the molten metal amount calculating means 22. Therefore, by adjusting the supply pressure of the pressurized air in accordance with the amount of the molten metal, the molten metal 14 can be supplied into the mold 4 at an appropriate hot water supply timing and speed to perform low-pressure casting. In order to effectively prevent the infiltration of the slag 23 into the cylindrical body 17, it is desirable to immerse the lower end of the cylindrical body 17 in the deep part of the molten metal 14.
また、上記湯面検知手段19から検知信号が出力された
時点で、筒体17の端部を大気に連通させる連通管16を大
気連通状態から加圧手段６の加圧空気供給管12を連通し
た状態に切換える切換手段21が設けられているため、鋳
型４の給湯時には筒体17内の湯面が加圧空気により容器
３内の湯面と同レベルまで押下げられることとなる。し
たがって、溶湯供給時に筒体17内の湯面がさらに押上げ
られて湯面検知手段19の検知部まで上昇することが防止
され、この検知部が熱影響を受けて損傷するのを確実に
防止することができる。また、筒体17内の湯面が容器３
内の湯面と同レベルになるように制御されるため、この
筒体17内に導入された溶湯量が加圧空気の供給圧力に応
じて不規則に変化することが防止され、この溶湯量の変
化に対応して給湯タイミング等が変動することを確実に
防止することができる。At the time when the detection signal is output from the molten metal level detecting means 19, the communication pipe 16 for communicating the end of the cylindrical body 17 to the atmosphere is connected from the atmosphere communication state to the pressurized air supply pipe 12 of the pressurizing means 6. Since the switching means 21 is provided for switching to a state in which the molten metal is supplied, the level of the molten metal in the cylinder 17 is pushed down to the same level as the level of the molten metal in the container 3 by pressurized air when the mold 4 is supplied with hot water. Therefore, when the molten metal is supplied, the molten metal level in the cylindrical body 17 is prevented from being further pushed up and raised to the detecting part of the molten metal level detecting means 19, and this detecting part is surely prevented from being damaged by the influence of heat. can do. Also, the surface of the hot water in the cylindrical body 17 is the container 3.
The level of the molten metal is controlled to be the same as the level of the molten metal in the inside, so that the amount of the molten metal introduced into the cylindrical body 17 is prevented from irregularly changing according to the supply pressure of the pressurized air. Can be reliably prevented from fluctuating in hot water supply timing or the like in response to the change in the temperature.
なお、上記連通管16の端部を大気連通状態とする代わ
りに、圧力が大気圧力状態に設定された不活性ガスの貯
留タンクに接続し、この貯留タンクから不活性ガスを上
記筒体17内に供給するように構成してもよく、この場合
には筒体17内の溶湯14が空気と接触して湯面に酸化膜が
形成されるのを防止できるという利点がある。また、上
記実施例では、鋳型４内に溶湯14を供給する低圧鋳造装
置からなる給湯機の制御装置について説明したが、本発
明はこれに限定されるものではなく、例えば他の炉もし
くは取鍋に溶湯を供給する給湯機についても適用可能で
ある。Instead of making the end of the communication pipe 16 communicate with the atmosphere, the pressure is connected to an inert gas storage tank set to an atmospheric pressure state, and the inert gas is supplied from the storage tank into the cylindrical body 17. In this case, there is an advantage that it is possible to prevent the molten metal 14 in the cylindrical body 17 from contacting air to form an oxide film on the molten metal surface. Further, in the above embodiment, the control device of the water heater comprising the low pressure casting device for supplying the molten metal 14 into the mold 4 has been described. However, the present invention is not limited to this. The present invention can also be applied to a water heater that supplies molten metal to the water heater.
（発明の効果） 以上説明したように本発明は、下端部が容器内に収容
された溶湯内に浸漬された筒体を設け、上記容器内の湯
面に加圧気体を供給して給湯を行なう際に、筒体内の湯
面の上昇状態を検出し、この湯面が所定の検知位置に上
昇したことを検知した時点における加圧気体の供給圧力
に基づいて容器内の溶湯量を算出するようにしたため、
溶湯の補充時等に鉱滓が生成されて溶湯の上面に浮遊し
た場合においても、この鉱滓の影響を受けることなく、
上記筒体内の湯面の上昇状態を正確に検出し、これに基
づいて容器内の溶湯量を正確に算出することができる。
したがって、上記容器内の溶湯量に対応させて加圧気体
の供給圧力を調節することにより、適正な給湯タイミン
グおよび速度で溶湯を供給することができる。(Effects of the Invention) As described above, the present invention provides a cylinder whose lower end is provided with a cylinder immersed in a molten metal accommodated in a container, and supplies pressurized gas to the surface of the molten metal in the container to supply hot water. When performing, the state of rise of the molten metal level in the cylinder is detected, and the amount of molten metal in the container is calculated based on the supply pressure of the pressurized gas at the time when it is detected that the molten metal level has risen to a predetermined detection position. So that
Even when slag is generated at the time of replenishment of the molten metal and floats on the upper surface of the molten metal, without being affected by the slag,
It is possible to accurately detect the rising state of the molten metal level in the cylindrical body, and to accurately calculate the amount of molten metal in the container based on this.
Therefore, by adjusting the supply pressure of the pressurized gas in accordance with the amount of molten metal in the container, the molten metal can be supplied at an appropriate timing and speed for supplying molten metal.
また、上記筒体の湯面が所定の検知位置に上昇して湯
面検出手段から湯面検知信号が出力された時点で、筒体
の上端部を大気圧雰囲気に連通させた状態から加圧気体
の供給圧力雰囲気に連通させた状態に切換える切換手段
を設けたため、鋳型に対する給湯時に筒体内の湯面が湯
面検知手段の検知の近傍まで上昇してこの検知部が熱影
響を受けたり、上記筒体内の湯面位置の変化に応じて給
湯のタイミング等が変動したりするのを効果的に防止で
きるという利点がある。Further, when the molten metal level of the cylinder rises to a predetermined detection position and a molten metal level detection signal is output from the molten metal level detecting means, the upper end of the cylinder is pressurized from a state where it is communicated with the atmospheric pressure atmosphere. Since the switching means for switching to a state of communicating with the gas supply pressure atmosphere is provided, at the time of hot water supply to the mold, the level of the molten metal in the cylinder rises to near the detection of the level detection means, and this detection unit is affected by heat, There is an advantage that the timing of hot water supply and the like can be effectively prevented from fluctuating according to a change in the position of the hot water surface in the cylinder.
第１図は本発明に係る給湯機の給湯制御装置の実施例を
示す断面図、第２図は上記給湯制御装置の制御動作を示
すフローチャート、第３図は給湯時の加圧特性を示すグ
ラフである。 ３……容器、５……溶湯供給管、６……加圧手段、13…
…制御手段、14……溶湯、15……圧力検出手段、17……
筒体、19……湯面検知手段、21……切換手段、22……溶
湯量演算手段。FIG. 1 is a cross-sectional view showing an embodiment of a hot water supply control apparatus for a hot water supply apparatus according to the present invention, FIG. 2 is a flowchart showing a control operation of the hot water supply control apparatus, and FIG. It is. 3 ... container, 5 ... molten metal supply pipe, 6 ... pressurizing means, 13 ...
... Control means, 14 ... Molten metal, 15 ... Pressure detecting means, 17 ...
Cylindrical body, 19: molten metal level detecting means, 21: switching means, 22: molten metal amount calculating means.
Claims (1)
によって加圧気体を作用させることにより、溶湯供給管
を通して溶湯を供給する給湯機において、下端部が上記
溶湯内に浸漬された筒体と、溶湯の供給時に筒体内の湯
面が所定の検知位置に上昇したことを検知する湯面検知
手段と、この湯面検知手段から湯面検知信号が出力され
た時点で上記筒体の上端部を大気圧雰囲気に連通させた
状態から上記加圧気体の供給圧力雰囲気に連通した状態
に切換える切換手段と、上記湯面検知信号の出力時点に
おける加圧気体の供給圧力を検出する圧力検出手段と、
この圧力検出手段の検出値に応じて容器内の溶湯量を演
算する溶湯量演算手段と、この溶湯量演算手段により算
出された溶湯量に基づいて上記加圧手段による加圧気体
の供給圧力を制御する制御手段とを設けたことを特徴と
する給湯機の給湯制御装置。In a water heater for supplying molten metal through a molten metal supply pipe, a lower end of the molten metal is immersed in the molten metal by applying a pressurized gas to the upper surface of the molten metal contained in the container. A cylindrical body, a level detecting means for detecting that the level of the molten metal in the cylindrical body has risen to a predetermined detection position when the molten metal is supplied, and the level of the cylindrical body when a level detecting signal is output from the level detecting means. A switching means for switching from a state in which the upper end of the nozzle is communicated with the atmospheric pressure atmosphere to a state in which the upper end is communicated with the supply pressure atmosphere of the pressurized gas, and a pressure for detecting the supply pressure of the pressurized gas at the output point of the molten metal level detection signal. Detecting means;
Melt amount calculating means for calculating the amount of molten metal in the container in accordance with the detected value of the pressure detecting means; and supply pressure of the pressurized gas by the pressurizing means based on the amount of molten metal calculated by the molten metal amount calculating means. A hot-water supply control device for a hot-water supply device, comprising: control means for controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62312770A JP2582384B2 (en) | 1987-12-09 | 1987-12-09 | Hot water supply control device for water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62312770A JP2582384B2 (en) | 1987-12-09 | 1987-12-09 | Hot water supply control device for water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01154860A JPH01154860A (en) | 1989-06-16 |
| JP2582384B2 true JP2582384B2 (en) | 1997-02-19 |
Family
ID=18033207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62312770A Expired - Fee Related JP2582384B2 (en) | 1987-12-09 | 1987-12-09 | Hot water supply control device for water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2582384B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4821549B2 (en) * | 2006-10-02 | 2011-11-24 | 株式会社デンソー | Dissolution holding device |
-
1987
- 1987-12-09 JP JP62312770A patent/JP2582384B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01154860A (en) | 1989-06-16 |
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